The son of the Colombo crime family’s boss and a top-ranking wiseguy pleaded guilty to raking in a fortune through a series of lucrative no-show job schemes targeting several major construction projects around the city.

Lawrence Persico, 49, the son of jailed-for-life Mafia boss Carmine Persico, confessed to working no-show jobs that brought him a windfall of $759,482 in ill-gotten gains – all of which must be forked over to the feds.

The reputed mob associate would get paid for clocking in at multiple sites on the same day, authorities charged.

“I got paid for a full eight hours when I worked four hours,” Persico admitted, as he pleaded guilty to mail-fraud charges that could land him behind bars for up to 33 months.

Also pleading guilty was John “Jackie” DeRoss, who admitted he helped the son of Colombo acting boss Joel “Joe Waverly” Cacace land phantom posts between August 2000 and January 2001 at the Cyclones’ stadium in Coney Island and Kingsborough Community College in Manhattan Beach.

DeRoss, the crime family’s former underboss, also is a target of a grand jury investigation into the murder of William “Wild Bill” Cutolo, a powerful wiseguy who disappeared in May 1999.